As an indicator of shifts in the Earth's climate, the isotope record has two advantages.

作为地球气候变化的指标，同位素记录有两个优势。

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Increases in the number of sucks were used as an indicator of the infant's attention to or preference for a given visual display.

吮吸次数的增加表明婴儿注意到或是喜爱眼前出现的物品。

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Head circumference is an indicator of brain volume, so a greater increase in head circumference in a newly-born baby suggests more rapid brain growth.

头围是大脑体积的一个衡量指标，所以新生儿头围越大，表明他们的大脑发育越快。

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"We did not anticipate that there would be an increase in this group and we believe it may be an indicator of a new risk factor for gastric cancer which has not yet been identified."

VOA: standard.2010.05.12

Whatever you choose, look for fruits that are firm and heavy, an indicator of juiciness.

WSJ: Missy Robbins's Sea Bass With Oranges, Olives and Basil | Slow Food Fast

Its dominance in the construction and mining markets makes Caterpillar an indicator of global economic cycles.

FORBES: Caterpillar More Than Quadruples Profits On Global Economic Recovery

It's an indicator that Iraq's leaders understand the importance of a government of national unity.

CNN: vert.bush.newser.02.pool.jpg